TECHNICAL DATA
IW4021B
8-Bit Shift Register
High-Voltage Silicon-Gate CMOS
The IW4021B is an Edge-Triggered 8-Bit Shift Register (Parallel-to-
Serial Converter) with a synchronous Serial Data Input (D
S
), a Clock
Input (CP), an asynchronous active HIGH Parallel Load Input (PL), eight
asynchronous Parallel Data Inputs (P
0
-P
7
) and Buffered Parallel Outputs
from the last three stages (Q
5
-Q
7
).
Information on the Parallel Data Inputs (P0-P7) is asynchronously
loaded into the register while the Parallel Load Input (PL) is HIGH,
independent of the Clock (CP) and Serial Data (D
S
) inputs. Data present
in the register is stored on the HIGH-to-LOW transition of the Parallel
Load Input (PL).
When the Parallel Load Input is LOW, data on the Serial Data Input
(D
S
) is shifted into the first register position and all the data in the register
is shifted one position to the right on the LOW-to-HIGH transition of the
Clock Input (CP).
•
Operating Voltage Range: 3.0 to 18 V
•
Maximum input current of 1
µA
at 18 V over full package-temperature
range; 100 nA at 18 V and 25°C
•
Noise margin (over full package temperature range):
1.0 V min @ 5.0 V supply
2.0 V min @ 10.0 V supply
2.5 V min @ 15.0 V supply
ORDERING INFORMATION
IW4021BN Plastic
IW4021BDW SOIC
T
A
= -55° to 125° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
SERIAL OPERATION:
t
n
n+1
n+2
n+3
CP
D
S
0
1
0
1
X
PL
0
0
0
0
0
Q
5
t=n+6
0
1
0
1
Q
5
P
7
D
Q
6
t=n+7
0
1
0
Q
6
Q
5
D
Q
6
D
Q
7
t=n+8
0
1
Q
7
Q
7
D
PARALLEL OPERATION:
CP
D
S
PL P
5
P
6
X
PIN 16 =V
CC
PIN 8 = GND
X
1
D
D
X = don’t care
D = 1 or 0
1
IW4021B
MAXIMUM RATINGS
*
Symbol
V
CC
V
IN
V
OUT
I
IN
P
D
P
D
Tstg
T
L
*
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
Power Dissipation per Output Transistor
Storage Temperature
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
Value
-0.5 to +20
-0.5 to V
CC
+0.5
-0.5 to V
CC
+0.5
±10
750
500
100
-65 to +150
260
Unit
V
V
V
mA
mW
mW
°C
°C
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IN
, V
OUT
T
A
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Operating Temperature, All Package Types
Min
3.0
0
-55
Max
18
V
CC
+125
Unit
V
V
°C
This device contains protection circuitry to guard against damage due to high static voltages or electric fields.
However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this
high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range GND≤(V
IN
or
V
OUT
)≤V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
). Unused
outputs must be left open.
2
IW4021B
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
Symbol
V
IH
Parameter
Minimum High-Level
Input Voltage
Test Conditions
V
OUT
=0.5 V or V
CC
- 0.5 V
V
OUT
=1.0 V or V
CC
- 1.0 V
V
OUT
=1.5 V or V
CC
- 1.5 V
V
CC
V
5.0
10
15
5.0
10
15
5.0
10
15
5.0
10
15
18
5.0
10
15
20
5.0
10
15
5.0
5.0
10
15
Guaranteed Limit
≥-55°C
3.5
7
11
1.5
3
4
4.95
9.95
14.95
0.05
0.05
0.05
±0.1
5.0
10
20
100
0.64
1.6
4.2
-2.0
-0.64
-1.6
-4.2
25°C
3.5
7
11
1.5
3
4
4.95
9.95
14.95
0.05
0.05
0.05
±0.1
5.0
10
20
100
0.51
1.3
3.4
-1.6
-0.51
-1.3
-3.4
≤125°C
3.5
7
11
1.5
3
4
4.95
9.95
14.95
0.05
0.05
0.05
±1.0
150
300
600
3000
0.36
0.9
2.4
mA
-1.15
-0.36
-0.9
-2.4
Unit
V
V
IL
Maximum Low -Level V
OUT
=0.5 V or V
CC
- 0.5 V
Input Voltage
V
OUT
=1.0 V or V
CC
- 1.0 V
V
OUT
=1.5 V or V
CC
- 1.5 V
Minimum High-Level
Output Voltage
Maximum Low-Level
Output Voltage
Maximum Input
Leakage Current
Maximum Quiescent
Supply Current
(per Package)
V
IN
=GND or V
CC
V
V
OH
V
V
OL
V
IN
=GND or V
CC
V
I
IN
I
CC
V
IN
= GND or V
CC
V
IN
= GND or V
CC
µA
µA
I
OL
Minimum Output Low V
IN
= GND or V
CC
(Sink) Current
V
OL
=0.4 V
V
OL
=0.5 V
V
OL
=1.5 V
Minimum Output High V
IN
= GND or V
CC
(Source) Current
V
OH
=2.5 V
V
OH
=4.6 V
V
OH
=9.5 V
V
OH
=13.5 V
mA
I
OH
AC ELECTRICAL CHARACTERISTICS
(C
L
=50pF, R
L
=200 kΩ, Input t
r
=t
f
=20 ns)
Symbol
f
max
Parameter
Maximum Clock Frequency
V
CC
V
5.0
10
15
5.0
10
15
5.0
10
15
5.0
10
15
5.0
3.0
6.0
8.5
320
160
120
320
160
120
200
100
80
Guaranteed Limit
≥-55°C
25°C
3.0
6.0
8.5
320
160
120
320
160
120
200
100
80
7.5
≤125°C
1.5
3.0
4.25
640
320
240
640
320
240
400
200
160
Unit
MHz
t
PLH
, t
PHL
Maximum Propagation Delay, CP to Qn
ns
t
PLH
, t
PHL
Maximum Propagation Delay, PL to Qn
ns
t
TLH
, t
THL
Maximum Output Transition Time, Any Output
ns
C
IN
Maximum Input Capacitance
pF
3
IW4021B
TIMING REQUIREMENTS
(C
L
=50pF, R
L
=200 kΩ, Input t
r
=t
f
=20 ns)
Symbol
t
w
Parameter
Minimum Pulse Width CP
V
CC
V
5.0
10
15
5.0
10
15
5.0
10
15
5.0
10
15
5.0
10
15
5.0
10
15
5.0
10
15
5.0
10
15
160
80
50
180
80
50
120
80
60
50
30
20
0
0
0
0
0
0
280
140
100
15
15
15
Guaranteed Limit
≥-55°C
25°C
160
80
50
180
80
50
120
80
60
50
30
20
0
0
0
0
0
0
280
140
100
15
15
15
≤125°C
320
160
100
360
160
100
240
160
120
100
60
40
0
0
0
0
0
0
560
240
200
15
15
15
Unit
ns
t
w
Minimum Pulse Width PL
ns
t
su
Minimum Setup Time, D
S
toCP
ns
t
su
Minimum Setup Time, Pn to PL
ns
t
h
Minimum Hold Time, D
S
toCP
ns
t
h
Minimum Hold Time, Pn to PL
ns
t
rec
Minimum Recovery Time PL
ns
t
r
, t
f
Maximum Input Rise or Fall Time
µs
EXPANDED LOGIC DIAGRAM
4
IW4021B
N SUFFIX PLASTIC
(MS - 001BB)
A
16
9
B
1
8
Dimensions, mm
Symbol
A
B
MIN
18.67
6.10
0.36
1.14
2.54
7.62
0°
2.92
7.62
0.20
0.38
10°
3.81
8.26
0.36
MAX
19.69
7.11
5.33
0.56
1.78
F
L
C
D
F
C
-T-
SEATING
PLANE
N
G
D
0.25 (0.010) M T
K
M
H
J
G
H
J
K
L
M
N
NOTES:
1. imensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
D SUFFIX SOIC
(MS - 012AC)
A
16
9
Dimensions, mm
Symbol
.
MIN
9.80
3.80
1.35
0.33
0.40
1.27
5.72
0°
0.10
0.19
5.80
0.25
8°
0.25
0.25
6.20
0.50
MAX
10.0
4.00
1.75
0.51
1.27
B
P
H
A
B
C
C
R x 45
1
G
8
D
F
G
-T-
D
0.25 (0.010) M T C M
K
SEATING
PLANE
J
F
M
H
J
K
M
P
R
NOTES:
1.Dimensions A and B do not include mold flash or protrusion.
2.Maximum mold flash or protrusion 0.15 mm (0.006) per side for A, for
B - 0.25 mm (0.010) per side.
5
